Mantrips shall be operated independently of ore or supply trips. Main fans (I-A, I-B, I-C, II-A, III, V-A, and V-B mines). (e) This standard is not applicable to rail beds. 57.7807 Flushing the combustion chamber. Protective equipment or clothing for welding, cutting, or working with molten metal. 57.6302 Separation of explosive material. 3, 2006]. 3, 2006]. (3) Equipped with an early warning fire detection device that will alert any person who could be endangered by a fire, provided that no person's work station is in the building. P17-IV-01 | Mine Safety and Health Administration (MSHA) (b) Vehicles containing explosives shall have, (1) No sparking material exposed in the cargo space; and. Electrical grounding means to connect with the ground to make the earth part of the circuit. (5) Cover or bulkhead the opening immediately below and adjacent to the activity with noncombustible material to prevent sparks or hot metal from falling down the shaft, raise, or winze. 57.22604 Blasting from the surface (II-B mines). 57.12010 Isolation or insulation of communication conductors. (a) Open flames, including cutting and welding, shall not be used underground. 57.12030 Correction of dangerous conditions. (d) A competent person shall test the mine atmosphere at each face blasted before work is started. Asbestos is a generic term for a number of asbestiform hydrated silicates that, when crushed or processed, separate into flexible fibers made up of fibrils. 57.14212 Chains, ropes, and drive belts. (b) Defects on any equipment, machinery, and tools that affect safety shall be corrected in a timely manner to prevent the creation of a hazard to persons. (1) Gas samples for the purpose of category or subcategory placement or change in placement, and for determining action levels, shall be taken in the mine atmosphere. (2) Where uranium is not minedno further exhaust mine air sampling is required. Fire extinguishers shall be recharged or replaced with a fully charged extinguisher promptly after any discharge. Underground transformer stations, combustible liquid storage and dispensing areas, pump rooms, compressor rooms, and hoist rooms. All electric detonators to be fired in a round shall be from the same manufacturer and shall have similar electrical firing characteristics. (ii) The most recent DPM monitoring results. Diesel equipment shall be shut off or immediately removed from the affected area; and. 57.12040 Installation of operating controls. 57.22216 Separation of intake and return air (I-C mines). (4) Vented or otherwise constructed to prevent development of pressure or vacuum as a result of filling, emptying, or atmospheric temperature changes. 57.19105 Landings with more than one shaft entrance. (a) Persons shall not work on top of, under, or work from mobile equipment in a raised position until the equipment has been blocked or mechanically secured to prevent it from rolling or falling accidentally. Mobile equipment shall not run over power conductors, nor shall loads be dragged over power conductors, unless the conductors are properly bridged or protected. Doors on main fans (I-A, II-A, III, and V-A mines). (b) Persons attempting to free chute hangups shall be experienced and familiar with the task, know the hazards involved, and use the proper tools to free material. Where restricted clearance creates a hazard to persons, the restricted clearance shall be conspicuously marked. Cables shall enter metal frames of motors, splice boxes, and electrical compartments only through proper fittings. The operator shall institute a reasonable program to assure that persons entering the mine do not carry such items. (c) Where a person works on or around mobile equipment, self-rescue devices may be placed in a readily accessible location on such equipment. Competent person means a person having abilities and experience that fully qualify him to perform the duty to which he is assigned. (f) Within 30 days after service of an initial decision of an Administrative Law Judge, the Assistant Secretary for Mine Safety and Health may undertake a discretionary review of the initial decision, or the mine operator, or representative of the miners may appeal the initial decision of the Administrative Law Judge to the Assistant Secretary. Tests for methane shall be made at electric auxiliary fans before they are started. (c) Vehicles used for dispensing bulk explosive material shall, (1) Have no zinc or copper exposed in the cargo space; and. A blasting galvanometer or other instrument designed for testing blasting circuits shall be used to test the following: (1) Continuity of each electric detonator in the blasthole prior to stemming and connection to the blasting line; (2) Resistance of individual series or the resistance of multiple balanced series to be connected in parallel prior to their connection to the blasting line; (3) Continuity of blasting lines prior to the connection of electric or electronic detonator series; and. This alternative applies only to activities involving a shaft, raise, or winze. (a) Where heat could cause premature detonation, explosive material shall not be loaded into hot areas, such as kilns or sprung holes. [53 FR 32526, Aug. 25, 1988, as amended at 55 FR 37218, Sept. 7, 1990]. When equipment must be moved or operated near energized high-voltage powerlines (other than trolley lines) and the clearance is less than 10 feet, the lines shall be deenergized or other precautionary measures shall be taken. 21, 2003; 80 FR 52988, Sept. 2, 2015]. Each such plan shall be posted at appropriate shaft stations and elsewhere in working areas where persons congregate; (e) Surface procedure to follow in an emergency, including the notification of proper authorities, preparing rescue equipment, and other equipment which may be used in rescue and recovery operations; and. 57.6102 Explosive material storage practices. When parked on a grade, the wheels or tracks of mobile equipment shall be either chocked or turned into a bank or rib. A minimum distance of 30 feet (9.1 meters) may replace the 50-foot (15.2-meter) requirement if the perimeter of loaded holes is demarcated with a barrier. (3) The materials must be rigged by a qualified rigger. Dust shall be controlled at muck piles, material transfer points, crushers, and on haulage roads where hazards to persons would be created as a result of impaired visibility. 57.12003 Trailing cable overload protection. (e) Between cars of trains, on the leading end of trains, on the leading end of a single railcar, or in other locations on trains that expose persons to hazards from train movement. Procedures for inspection, testing, and maintenance. The procedure for inspection, testing and maintenance required by standard 57.19120 shall be utilized at least every 30 days for hoists designated as emergency hoists in any evacuation plan. How Dnipro's tough-talking mayor keeps his city on a war footing Explosive materials used for blasting shall be approved by MSHA under 30 CFR part 15, or nonapproved explosive materials shall be evaluated and determined by the District Manager to be safe for blasting in a potentially gassy environment. Such circuits need not be deenergized between 25 to 50 feet of the electric detonators if stray current tests, conducted as frequently as necessary, indicate a maximum stray current of less than 0.05 ampere through a 1-ohm resistor as measured at the blast site. (1) Any record listed in this section which is required to be retained at the mine site may, notwithstanding such requirement, be retained elsewhere if the mine operator can immediately access the record from the mine site by electronic transmission. Backpoling of trolleys is prohibited except where there is inadequate clearance to reverse the trolley pole. (1) Capable of withstanding working pressures and stresses and compatible with the type of liquid stored; (2) Maintained in a manner that prevents leakage; (3) Isolated or separated from ignition sources to prevent fire or explosion; and. 57.9101 Operating speeds and control of equipment. When conveyances controlled by a hoist operator are not in use, they shall be released and the conveyances shall be raised or lowered a suitable distance to prevent persons from boarding or loading the conveyances. 57.3460 Maintenance between machinery or equipment and ribs. (4) If located less than 20 feet from exposed timber or other combustibles, the control door or bulkhead shall provide protection at least equivalent to a door constructed of two layers of wood, each a minimum of three-quarters of an inch in thickness. (2) All persons, except those working on the fan, shall be withdrawn, the ventilation shall be restored to normal and the air quality in the affected active workings shall be tested by a competent person to assure that the air quality meets the requirements of the standards in subpart D of this part, before any other persons are permitted to enter the affected active workings. (2) Hooks with self-closing latches or their equivalent must be used. This document is available at any MSHA Metal and Nonmetal Safety and Health district office. Examples of detonators are blasting caps, electric or non-electric instantaneous or delay blasting caps and delay connectors. Fixed ladders, except on mobile equipment, shall be offset and have substantial railed landings at least every 30 feet unless backguards or equivalent protection such as safety belts and safety lines, are provided. (3) By properly assembled anchor bolts, clamps, or wedges, provided that the attachment is a design feature of the hoist drum. This web site is designed for the current versions of (b) In addition, the buildings or rooms shall be, (1) Constructed to meet a fire resistance rating of at least one hour; or, (2) Equipped with an automatic fire suppression system; or. This back-up system shall provide and maintain a respirable atmosphere in the enclosure for a period of time equal to at least twice the time necessary to complete the evacuation of all persons designated to use that hoist as prescribed in the mine escape and evacuation plan required under standard 57.11053; or. 3, 2006]. [53 FR 32528, Aug. 25, 1988; 53 FR 44588, Nov. 4, 1988, as amended at 60 FR 33722, June 29, 1995; 67 FR 38385, June 4, 2002; 68 FR 19347, Apr. (1) The materials being hoisted must be rigged to prevent unintentional displacement. Section 75.1400 (e) requires that when persons are transported into or out of a mine by a hoist, a qualified hoisting engineer shall be on duty while any person is underground. All personnel hoists used by employees shall be constructed of materials and components which meet the specifications for materials, construction, safety devices, assembly, and structural integrity as stated in the American National Standard A10.4-1963, Safety Requirements for Workmen's Hoists. by Ukrainian sporting regulations. (d) Each mine and mill shall be required to operate in accordance with the safety standards applicable to its particular category or subcategory. Capped fuse means a length of safety fuse to which a blasting cap has been attached. Using an open flame to bend or heat materials. A method of refuge shall be provided while a second opening to the surface is being developed. Nonelectric BlastingSurface and Underground, Extraneous ElectricitySurface and Underground. Face shields or goggles in good condition shall be worn when operating a grinding wheel. 57.22101 Smoking (I-A, II-A, III, and V-A mines). Ground wires for lighting circuits powered from trolley wires shall be connected securely to the ground return circuit. Where radon daughter concentrations exceed 10 WL, respirator protection against radon gas shall be provided in addition to protection against radon daughters. Scaling and SupportSurface and Underground. (1) Maintained in good condition and shall comply with the requirements of subpart M of this part; (2) Equipped with sides and enclosures higher than the explosive material being transported or have the explosive material secured to a nonconductive pallet; (3) Equipped with a cargo space that shall contain the explosive material (passenger areas shall not be considered cargo space); (4) Equipped with at least two multipurpose dry-chemical fire extinguishers or one such extinguisher and an automatic fire suppression system; (5) Posted with warning signs that indicate the contents and are visible from each approach; (6) Occupied only by persons necessary for handling the explosive material; (7) Attended or the cargo compartment locked at surface areas of underground mines, except when parked at the blast site and loading is in progress; and, (ii) The wheels chocked if movement could occur; and. 1291 (30 U.S.C. The Category or Subcategory applicability of each standard appears in the parentheses of each standard's title line. Seat belts required under this section shall meet the requirement of SAE J386, Operator Restraint System for Off-Road Work Machines (1985, 1993, or 1997), or SAE J1194, Roll-Over Protective Structures (ROPS) for Wheeled Agricultural Tractors (1983, 1989, 1994, or 1999), as applicable, which are incorporated by reference. All metal pipelines, 1,000 feet or more in length running parallel to trolley tracks, that are used as a ground return circuit shall be bonded to the return circuit rail at the ends of the pipeline and at intervals not to exceed 500 feet. (c) Bearing plates shall be used with fixtures when necessary for effective ground support. During emergency braking, the deceleration shall not exceed 16 feet per second per second. This content is from the eCFR and is authoritative but unofficial. 57.19072 Skips and cages in same compartment. The wood construction shall be covered on all sides and edges with no less than twenty-four gauge sheet steel. (b) The mine operator must provide affected miners and their representatives with an opportunity to observe exposure monitoring required by this section. Equipment and supplies shall be loaded, transported, and unloaded in a manner which does not create a hazard to persons from falling or shifting equipment or supplies. The operator must retain the information in the log for one year after the date the tagged equipment was examined. A means of ventilating faces shall be provided before workings are abandoned in unsealed areas, unless crosscuts are provided within 30 feet of the face. (c) Fire extinguishers or fire suppression systems shall be of a type and size that can extinguish fires of any class in their early stages which could originate from the equipment's inherent fire hazards. (2) Continuity of blasting lines prior to the connection of electric or electronic detonators. Persons shall stay clear of suspended loads. (ii) If the equipment exceeds the maximum stopping distance in the initial test run, the mine operator may request from the inspector up to four additional test runs with two runs to be conducted in each direction. (ii) Increases in wages of the transferred miner must be based upon the new work classification. If blasting a loaded round may be delayed for more than 72 hours, the operator shall notify the appropriate MSHA district office. Operator-carrying overhead cranes shall be provided with. All headframes shall be constructed with suitable design considerations to allow for all dead loads, live loads, and wind loads. The potential on bare signal wires accessible to contact by persons shall not exceed 48 volts. [52 FR 24941, July 1, 1987, as amended at 52 FR 41397, Oct. 27, 1987; 60 FR 33722, June 29, 1995]. A suitable communication system shall be provided at the mine to obtain assistance in the event of an emergency. 57.19074 Riding the bail, rim, bonnet, or crosshead. The written examination is 30 questions pertaining to State laws/regulations and arc flash. (d) Covered on all combustible interior and exterior structural surfaces with noncombustible material or limited combustible material, such as five-eighth inch, type X gypsum wallboard. (b) If the monitoring system indicates that methane in the mine is less than 1.0 percent, persons may enter the mine, and all places blasted shall be tested for methane by a competent person before work is started. All places blasted shall be tested for methane by a competent person before work is started. 57.20001 Intoxicating beverages and narcotics. Openings above, below, or near travelways through which persons or materials may fall shall be protected by railings, barriers, or covers. Persons shall not enter the mine until ventilating air has passed over the blast area and through at least one atmospheric monitoring sensor. See Water gel.. Signs warning against smoking and open flames shall be posted in these areas. (4) Category IV applies to mines in which noncombustible ore is extracted and which liberate a concentration of methane that is not explosive nor capable of forming explosive mixtures with air based on the history of the mine or the geological area in which the mine is located. Rock or supplies shall not be hoisted in the same shaft as persons during shift changes, unless the compartments and dumping bins are partitioned to prevent spillage into the cage compartment. 61 FR 36801, July 12, 1996, unless otherwise noted. (c) Blasting lines shall be kept shunted until immediately before blasting. (c) Dry vegetation shall not be permitted within 25 feet of mine openings. Stationary diesel equipment underground shall be, (a) Supported on a noncombustible base; and. In addition definitions contained in any subpart of part 57 apply in that subpart. Safe means of access shall be provided and maintained to all working places. The operator must provide the first copy of a requested record at no cost, and any additional copies at reasonable cost. (c) If the monitoring system indicates that methane in the mine is 0.5 percent or more, the mine shall be ventilated and persons shall not enter the mine until the monitoring system indicates that methane in the mine is less than 0.5 percent. (a) Battery-charging stations shall be ventilated with a sufficient volume of air to prevent the accumulation of hydrogen gas. Explosive material shall be transported without undue delay to the storage area or blast site. Secondary blasts fired at the same time in the same work area shall be initiated from one source. (b) All piping, valves, and fittings shall be. (c) A safety washer on each side of the wheel. (2) Equipped with a device that automatically deenergizes power in affected workings should the fan stop; and. 57.12084 Branch circuit disconnecting devices. (1) Posted with warning signs that indicate the contents and are visible from any approach; (2) Used exclusively for the storage of explosive material and necessary equipment associated with explosive material storage and delivery: (i) Portions of the facility used for the storage of explosives shall only contain nonsparking material or equipment. (c) Every floor, working place, and passageway shall be kept free from protruding nails, splinters, holes, or loose boards, as practicable. Tests for methane shall be conducted in the mine atmosphere by a competent person, (a) At least once each shift prior to starting work in each face and raise; and. The movement of a shaft conveyance on a one bell signal is prohibited. Permanent blasting lines shall be properly supported. 57.12019 Access to stationary electrical equipment or switchgear. (a) Methane monitoring devices and portable, battery-powered, self-contained devices used for measuring methane, other gases, and contaminants in mine air shall be approved by MSHA under the applicable requirements of 30 CFR parts 18, 21, 22, 23, 27, and 29. (c) If the monitoring system indicates the presence of 1.0 percent or more methane, persons other than examiners shall not enter the mine until the mine has been examined by a competent person and the methane content has been reduced to less than 1.0 percent. (b) Faces shall be examined for proper placement of holes, possible breakthrough, and water. 57.16004 Containers for hazardous materials. (a) Waste materials, including liquids, shall not accumulate in quantities that could create a fire hazard. A miner's personal exposure to asbestos shall not exceed an 8-hour time-weighted average full-shift airborne concentration of 0.1 fiber per cubic centimeter of air (f/cc). (3) Located in areas free of combustible materials or in areas where any exposed combustible materials are coated with one inch of shotcrete, one-half inch of gunite, or other noncombustible material with equivalent fire protection characteristics. Mobile equipment shall not be left unattended unless the controls are placed in the park position and the parking brake, if provided, is set. 57.7051 Loose objects on the mast or drill platform. Persons experienced in examining and testing for loose ground shall be designated by the mine operator. 57.9314 Trimming stockpile and muckpile faces. The framework assembly of the door and the surrounding bulkhead, if any, shall be at least equivalent to the door in fire and air-leakage resistance, and in physical strength. Following evacuation of a mine in a fire emergency, only persons wearing and trained in the use of mine rescue apparatus shall participate in rescue and firefighting operations in advance of the fresh air base. Arrangements shall be made in advance for obtaining emergency medical assistance and transportation for injured persons. MSHA will accept such a certifying statement annually, without regard to format, if it is made available at the time of inspection. Hoists shall have rated capacities consistent with the loads handled and the recommended safety factors of the ropes used. (3) Category III applies to mines in which noncombustible ore is extracted and which liberate a concentration of methane that is explosive, or is capable of forming explosive mixtures with air, or have the potential to do so based on the history of the mine or the geological area in which the mine is located. (b) An operator must retain a record at the mine site of the training required by this section for one year after completion of the training. Damaged or deteriorated explosive material shall be disposed of in a safe manner in accordance with the instructions of the manufacturer. 57.22202 Main fans (I-A, I-B, I-C, II-A, III, V-A, and V-B mines). 57.6501 Nonelectric initiation systems. Drill holes large enough to constitute a hazard shall be covered or guarded. 21, 2003; 80 FR 52988, Sept. 2, 2015]. (a) Uniform fittings or readily available adapters for onsite firefighting equipment; (b) Readily available wrenches or keys to open the valves; and. (2) Whenever a fire or its effects would not impede escape from the equipment but could affect the escape of other persons in the area, a fire extinguisher shall be on the equipment or within 100 feet of the equipment. Seals shall be provided with a means for checking the quality of air behind the seal and a means to prevent a water head from developing unless the seal is designed to impound water. At the time of completion, the person performing inspections, tests, and maintenance of shafts and hoisting equipment required in standard 57.19120 shall certify, by signature and date, that they have been done. (b) If the destruction of any bulkhead on an inactive level would allow fire contaminants to reach an escapeway, that bulkhead shall be constructed and maintained to provide at least the same protection as required for control doors under Table C3. 57.12041 Design of switches and starting boxes. (3) Delineators are installed along the perimeter of the elevated roadway so that, for both directions of travel, the reflective surfaces of at least three delineators along each elevated shoulder are always visible to the driver and spaced at intervals sufficient to indicate the edges and attitude of the roadway. (a) The operator shall calculate and record complete individual exposures to concentrations of radon daughters as follows: (1) Where uranium is minedthe complete individual exposures of all mine personnel working underground shall be calculated and recorded. Mine emergency and self-rescuer training. Separation shall be sufficient to prevent the occurrence or minimize the spread of fire. 57.19063 Persons allowed in hoist room. (2) Category II applies to domal salt mines where the history of the mine or geological area indicates the occurrence of or the potential for an outburst. 57.22207 Booster fans (I-A, II-A, III, and V-A mines). When persons are on the shaft bottom, a chain ladder, wire rope ladder, or other extension ladders shall be used from the fixed ladder or lower limit of the escape hoist to the shaft bottom. (c) Where average gamma radiation measurements are in excess of 2.0 milliroentgens per hour in the working place, gamma radiation dosimeters shall be provided for all persons affected, and records of cumulative individual gamma radiation exposure shall be kept. (a) The mine atmosphere shall be tested for methane and carbon monoxide at least once every seven days by a competent person or an atmospheric monitoring system, or a combination of the two. 57.19107 Precautions for work in compartment affected by hoisting operation. Travel is permitted when necessary for persons to dismount. The Assistant Secretary shall fix a time for filing any objections to the suggested changes and supporting reasons. Personal electric lamps (I-A, I-B, I-C, II-A, II-B, III, IV, V-A, and V-B mines). Transformer enclosures shall be kept locked against unauthorized entry. 57.14113 Inclined conveyors: backstops or brakes. 57.6130 Explosive material storage facilities. (c) When a condition that may adversely affect safety or health is corrected, the examination record shall include, or be supplemented to include, the date of the corrective action. In such cases, the inspector will rely upon other available evidence to determine whether the service brake system meets the performance requirements of this standard. 57.13001 General requirements for boilers and pressure vessels. Attended means presence of an individual or continuous monitoring to prevent unauthorized entry or access.
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